An Afghan policeman opened fire on Coalition soldiers operating in Helmand province earlier today, killing two British soldiers. Today's killing of Coalition forces marks the 40th green-on-blue, or insider attack, in Afghanistan that has been reported so far this year. The International Security Assistance Force confirmed that two of its soldiers were killed in today's attack, but did not state the nationality of those killed or the location of the attack. "An individual wearing the uniform of an Afghan policeman turned his weapon against International Security Assistance Force service members in southern Afghanistan today, killing two," the NATO command said in a press release . "The incident is currently under investigation." Afghan officials said that the attack took place in Helmand province, and two British soldiers were killed, Pajhwok Afghan News reported . The Afgh...